Perhaps you should try some spelling variations:
network synthesis » network systems
systems support » system support, systems supporting, system supporting
health service » health services
systems report » system report, systems recent, systems transport
health device » health services
health dence » health evidence, health science, health devices

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("((((health dence) or (health service))) or (health device)) network synthesis report") OR ("((((health dence) or (health service))) or (health device)) network ((systems report) or (systems support))")).
• Removing quotes may allow a broader search: (( ((((health dence) or (health service))) or (health device)) network synthesis report ) or ( ((((health dence) or (health service))) or (health device)) network ((systems report) or (systems support)) )).
• Adding a wildcard symbol may retrieve word variants: (("((((health dence) or (health service))) or (health device)) network synthesis report") or ("((((health dence) or (health service))) or (health device)) network ((systems report) or (systems support))"))*.